Meteorology

Photoelectric total radiation sensor, based on the principle of photoelectric induction, consists of a sensor core, an optical material window, an aluminum alloy shell, and a waterproof aviation plug, which can be used to measure the total radiation value of sunlight. The sensor uses a high-precision silicon-based photosensitive element with wide spectrum absorption, high absorption in the full spectrum range, and good stability; at the same time, a dust cover with a transmittance of up to 95% is installed outside the sensing element. The dust cover is specially treated to reduce dust absorption and effectively prevent environmental factors from interfering with internal components, and can measure solar radiation more accurately.

Thermoelectric Total Radiation Sensor measures the total solar radiation in the spectral range of 0.3-3μm based on the thermoelectric effect. It can also be used to measure oblique radiation, reflected radiation, and scattered radiation. The sensing element adopts a wire-wound electroplated thermopile. The cold and hot junctions generate a temperature difference potential, which is converted into radiation flux density. Integrated temperature and nonlinear compensation functions. Double-layer quartz glass windshield, the inner cover has an infrared band isolation function, and the transmittance is as high as 0.95 or more.

Note 1: Add a shading ring to measure scattered radiation;

Note 2: The sensing face is downward to measure reflected radiation

The total radiation sensor is based on the principle of thermoelectric effect. It adopts a winding electroplating multi-node thermopile with a black coating with high absorption rate. When there is light, the temperature difference between the hot and cold contacts is generated, which generates a potential difference, and then converts the light signal into an electrical signal output. Within the linear error range, the output signal is proportional to the solar radiation. The radiation meter has an integrated temperature compensation device, which can automatically compensate the output potential of the radiation meter by adjusting the temperature coefficient of the thermistor.

Long-wave radiation sensor/earth radiation sensor, based on the principle of thermoelectric effect, is used to measure infrared radiation with a wavelength range of 4 to 50μm from the atmosphere and the earth's surface. It consists of a silicon arc filter cover, a sensing element, a thermistor, a meter body, a shading plate, a desiccant window and other components. The sensing element consists of a wound electroplated multi-junction thermopile, and the sensing surface is coated with a high-absorption matte black coating to absorb radiation energy. The heat generated passes through the thermal resistor, causing the temperature of the thermopile to change and convert it into a voltage signal output. The sensor integrates a temperature compensation device.

Net radiation sensor (net radiation meter), based on thermoelectric effect, measures the net difference between solar radiation and ground radiation, and measures short-wave radiation in the spectral range of 0.27-3μm. It adopts a winding electroplating multi-node thermopile, and the upper and lower surfaces of the thermopile are close to the sensing surface coated with matte black paint. When the upper and lower sensing surfaces are subjected to different light radiation, their respective thermopiles are heated to form hot and cold nodes, generating a temperature difference potential. There are two windshields on the upper and lower parts of the sensor, which are made of polyethylene film with high light transmittance (long-wave radiation band of 3000-12000nm).

Net total radiation sensor (net total radiation meter), based on the principle of thermoelectric effect (thermopile), measures the net difference between the total wave radiation projected downward from the sky and the total wave radiation projected upward from the earth's surface. Net total radiation meter, composed of 2 short-wave radiation meters and 2 long-wave radiation meters. Short-wave radiation meter consists of quartz cover, sensing element, meter body and other components. Long-wave radiation meter consists of silicon arc filter cover, sensing element, platinum resistor, meter body and other components. Each radiation meter can output each data separately, and can measure short-wave radiation, long-wave radiation, total wave radiation, net total radiation, short-wave reflectivity, and long-wave reflectivity.

Direct radiation sensor, based on the principle of thermoelectric effect (thermopile), measures direct solar radiation in the spectral range of 0.3μm-3μm. In order to allow only solar radiation to reach the sensing surface, a 0.5° shading cylinder is used. The α angle of the shading cylinder is 10°, and there are several layers of gratings inside (to reduce light diffusion). When aimed at the sun, the sun's light just falls on the thermopile sensing surface at the bottom of the cylinder. The integrated tracking device uses a 12V DC stepper motor, which is controlled by a microcomputer and accurately tracks the trajectory of the sun. When the direct solar radiation exceeds 120W·m-2, it can be connected to a sunshine hour recorder to directly measure the sunshine hours.

The fully automatic solar tracker is a high-precision solar tracker. After years of practical testing, it has been widely used throughout the country. This tracker uses a four-quadrant solar sensor that can automatically compensate for mechanical deviations. This product can be loaded with various types of solar radiation meters, with excellent performance, high tracking accuracy, excellent load capacity, strong environmental adaptability, and can work stably under various extreme climatic conditions.

The wind direction sensor is based on mechanical transmission and consists of a shell, a wind vane and a circuit module. It is small and light, easy to carry and assemble. The shape of the wind vane is reasonably designed, and it has an accurate positioning function for the natural atmospheric wind direction. It uses high-quality polymer carbon fiber as raw material, which has good anti-corrosion and anti-erosion characteristics, and can ensure that the instrument will not rust after long-term use. At the same time, it cooperates with the internal smooth bearing system to ensure the accuracy of information collection.

The wind speed sensor is based on mechanical transmission and consists of a shell, a wind cup and a circuit module. It is small and light, easy to carry and assemble, and the three-cup design effectively obtains external environmental information. It uses high-quality polymer carbon fiber as raw material, which has good anti-corrosion and anti-erosion characteristics, can ensure that the instrument will not rust after long-term use, and at the same time, with the smooth internal bearing system, it ensures the accuracy of information collection.

The wind speed and direction sensor perfectly combines the wind speed sensor and wind direction sensor into one, which is more convenient to install and carry, eliminating the tedious steps of on-site wiring and separate installation. This wind speed and direction meter uses a special mold precision die-casting process, which has high strength, weather resistance, corrosion resistance, waterproofness, light weight, small starting torque, low inertia and other characteristics.

The micro ultrasonic wind speed and direction sensor is based on the ultrasonic transit time principle. It is a wind measuring instrument made according to the principle that the propagation speed of ultrasonic waves in the air changes with wind direction and wind speed. It can simultaneously measure the instantaneous values of wind speed and wind direction. Compared with mechanical devices, acoustic measurement has the characteristics of wide wind range, high sensitivity, and fast response speed. It has no moving parts, no maintenance and on-site calibration, and can output wind speed and wind direction at the same time.